<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="utf-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"/>
    <title>二级导航</title>
    <link href="css/bootstrap.css" rel="stylesheet">
    <style>

    </style>
</head>
<body>
<div class="container" style="margin: 20px">


    <!--二级导航-->
    <ul class="nav nav-pills ">
        <li class="active"><a href="#">首页</a></li>
        <li><a href="#">图书</a></li>
        <li><a href="#">个人</a></li>
        <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">其他
                <span class="caret"></span>
            </a>
            <ul class="dropdown-menu ">
                <li><a href="#">收藏 </a></li>
                <li><a href="#">关于我们</a></li>
                <li><a href="#">联系卖家</a></li>
                <li><a href="#">退换货</a></li>
            </ul>
        </li>
    </ul>
</div>

<script src="js/jquery-1.12.4.js"></script>
<script src="js/bootstrap.js"></script>
</body>
</html>